Preventative Maintenance: The Condo Risks You Don’t See

Estimated reading time: 7 minutes

Preventative maintenance in a condo building is not optional. It can be the difference between a routine service call and a major insurance claim.

A dishwasher hose. A washing machine supply line. A fitting under the kitchen sink. None of these look like emergencies until water starts moving through a building at two in the morning.

Here is what proactive maintenance can prevent, and why many owners only appreciate its value after something goes wrong.

A condominium corporation recently issued a notice to residents about aging dishwasher hoses. The message was straightforward: rubber supply hoses deteriorate over time. Small leaks can form, and water may move beneath flooring or behind walls before anyone notices.

By the time the damage becomes visible, the problem may no longer be a simple hose replacement. It can involve flooring, subfloor, drywall, cabinetry, and potentially the unit below.

What makes this type of warning important is its ordinariness. This is not necessarily a freak accident or unusual manufacturing defect. Appliance connections age. Fittings loosen. Components wear.

This is the gap between reactive property ownership and preventative property management. In a multi-unit building, the financial difference between the two can be substantial.

Why water damage is a major risk for condo owners

Water damage is one of the most significant insurance risks in Canadian residential properties.

According to the Insurance Bureau of Canada , 2024 was a record year for severe weather-related insured losses in Canada, with flooding causing nearly $1 billion in insured damage across the Greater Toronto Area.

The causes of weather-related flooding are different from an appliance leak inside a condo, but the scale of the losses illustrates how quickly water damage can become expensive.

In a detached home, an appliance leak is primarily a household problem. In a condo, it can become a building problem within hours.

Water can move through floors, walls, shared infrastructure, and electrical or mechanical penetrations, affecting units that have nothing to do with the original source.

A leaking appliance connection on an upper floor can therefore damage multiple units before the source is identified and the water supply is shut off.

Then the harder conversation begins: who pays?

The liability chain — and where it can become expensive

In Ontario condominiums, financial responsibility for water damage depends on factors including where the water originated, what was damaged, the condominium corporation's declaration and bylaws, and the applicable insurance coverage.

The condominium corporation's master insurance policy generally covers the common elements and the standard unit as defined by the corporation. The unit owner's insurance may cover improvements, contents, liability, and certain deductible assessments depending on the policy.

The important point for owners is that a water incident originating from their unit can create exposure well beyond the cost of repairing their own property.

A 2024 Ontario condominium case discussed by Robson Carpenter LLP involved a toilet overflow that caused approximately $42,000 in damage across multiple units and common areas. The condominium corporation's deductible was $50,000, and the resulting charge became a significant issue for the unit owner.

Condominium water-damage deductibles can also be substantial. Depending on the building and its insurance history, deductibles may reach tens of thousands of dollars or more.

That is why condo owners should understand both the corporation's insurance deductible and the deductible-assessment coverage included in their own policy.

What actually causes these incidents

Many water incidents begin with ordinary unit-level components that deteriorate gradually and are easy to ignore because they are hidden from view.

Flexible supply lines connect dishwashers, washing machines, toilets, sinks, and other fixtures to the building's water system. Over time, hoses, fittings, seals, and connections can deteriorate.

They often sit behind appliances or beneath cabinets where a developing problem may not be visible during normal day-to-day use.

By the time moisture appears on the finished surface, water may already have spread beneath flooring or into a wall cavity.

Reactive versus preventative condo maintenance

Reactive property ownership operates on a simple principle: if something is not visibly failing, leave it alone.

That approach works poorly for components that deteriorate slowly because the early stages of failure can remain invisible.

Preventative property management asks a different question: which components are likely to require attention before the next inspection cycle, and what does addressing them now cost compared with addressing them after failure?

A proactive hose replacement through a licensed Toronto plumber may cost a few hundred dollars depending on the service call, labour, parts, and accessibility.

The same component failing while a tenant is away can potentially result in damage to flooring, drywall, cabinetry, subfloor, and neighbouring units.

This is why a structured preventative maintenance program should not be viewed only as an additional operating expense. It is also a way of addressing predictable failures earlier, when they are usually less disruptive and less expensive.

What preventative inspections look for

A preventative inspection may include checking:

• Supply hose condition and visible signs of aging.
• Under-sink fittings for corrosion or moisture.
• Toilet supply connections, fill valves, and other components.
• Dishwasher and washing-machine connections.
• HVAC condensate drainage where applicable.
• Window and balcony areas for water-entry concerns.
• Early moisture indicators around fixtures, cabinets, and flooring seams.

The objective is not to predict every failure. It is to identify visible warning signs before they become larger problems.

What tenants may not notice — and why it matters

An additional consideration in tenanted units is that tenants are not usually monitoring the property from a preventative-maintenance perspective.

• They are unlikely to routinely inspect behind a dishwasher for moisture.
• They may not know what deterioration at a washing-machine hose connection looks like.
• They may not recognize early discolouration near a plumbing connection as a warning sign.

These are not necessarily reasonable things to expect a tenant to identify.

The owner — and, in a professionally managed property, the property manager — needs a system for inspecting and monitoring the physical condition of the rental.

A small drip beneath a kitchen sink, for example, can slowly damage a cabinet base and subfloor before eventually becoming visible elsewhere.

By that stage, the remediation may extend well beyond repairing the original fitting.

In multi-unit buildings, damage that develops out of sight can become some of the most expensive damage to address.

The system designed to reduce that risk is not only emergency response. It is scheduled access, documented inspections, and replacement of aging components before obvious failure.

Prevention as risk management, not expense management

There is a framing problem in how preventative maintenance is sometimes viewed.

It can be treated purely as an expense — something that can be deferred when margins are tight or the unit appears to be functioning normally.

But preventative maintenance is also risk management.

The cost of replacing a worn hose or deteriorating fitting is relatively predictable. The cost of a water incident is not.

In a condominium, the financial consequences may also extend beyond the owner's unit to neighbouring properties, common elements, insurance claims, and potentially the condominium corporation's deductible.

The more useful question is therefore not simply whether a maintenance item can be postponed. It is whether postponing it materially increases the chance of a much more expensive failure.

At LandLord Property & Rental Management, preventative maintenance inspections form part of how rental properties are monitored over time.

Most inspections do not uncover an emergency. That is not a failure of the inspection.

The value comes from identifying the aging hose, weeping fitting, moisture indicator, or other developing condition early enough that the response is still a routine maintenance decision rather than an insurance event.

Frequently Asked Questions

Who is responsible for water damage in a condo in Ontario?

Responsibility depends on the source of the water, what was damaged, the condominium corporation's declaration and bylaws, applicable provisions of Ontario condominium law, and the insurance policies involved. If water originates from a unit, the owner may face responsibility for some or all of the corporation's deductible depending on the circumstances.

How much is the water-damage deductible in a Toronto condo building?

There is no single standard deductible. The amount varies by condominium corporation, insurer, claims history, and type of loss. Water-damage deductibles in some Toronto condominiums can reach tens of thousands of dollars or more, which is why owners should review both the corporation's deductible and their own deductible-assessment insurance coverage.

How often should condo owners replace appliance supply hoses?

Replacement timing depends on the hose type, manufacturer guidance, installation, condition, and environment. Owners should inspect supply lines periodically and replace components showing deterioration rather than waiting for visible failure.

What does a preventative maintenance inspection for a condo cover?

A preventative inspection can include appliance supply hoses, plumbing connections, under-sink fittings, toilets, HVAC drainage, window and balcony areas, and early signs of moisture around fixtures, cabinets, and flooring.

Why don't tenants always catch these problems earlier?

Tenants generally use the property as their home rather than inspect it as a building professional would. Many early warning signs are hidden behind appliances, beneath sinks, or inside areas that are not part of normal daily observation. Scheduled inspections give owners and property managers an opportunity to check those areas systematically.

Is preventative maintenance for condos worth the cost?

Preventative maintenance cannot eliminate every failure, but it can identify aging or deteriorating components before they create a larger problem. In a multi-unit building, where a relatively small leak can affect neighbouring units and trigger an insurance claim, that risk reduction can be particularly valuable.